Re: [Tutor] Not returning out the series

2017-07-04 Thread Sibylle Koczian 

Am 04.07.2017 um 04:40 schrieb Rafael Skovron:

Hi as a challenge I have got to sum a series i / (i+1). My code isn't
summing right. Any ideas why?


def main():
 print("{0:15s}{1:20s}".format("i","m(i)"))
 for i in range(1,20):
 print("{0:<15d}{1:<20.4f}".format(i,m(i)))

def m(i):
 total = 0
 for i in range(1,i+1,1):
 total+=(i/(i+1))
 return total


Python 2 or Python 3? What sums do you get and what sums do you expect?

BTW in your function m(i) it's very confusing that you use the name i 
both for the range limit and for the loop variable. It seems to be 
syntactically correct, but it's certainly not readable.


HTH
Sibylle

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Re: [Tutor] Not returning out the series

2017-07-04 Thread Alan Gauld via Tutor 
On 04/07/17 03:40, Rafael Skovron wrote:

> def m(i):
> total = 0
> for i in range(1,i+1,1):
> total+=(i/(i+1))
> return total

convert the numerator to a float. Otherwise you
are using integer division. (I'm guessing you
are running Python 2.7?)

You could also import division from future:

from __future__ import division

Alternatively you could try running Python v3.

PS, Its probably not a great idea to use i as both
the iteration variable and the input parameter.
It easily causes confusion.

-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos


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[Tutor] Not returning out the series

2017-07-04 Thread Rafael Skovron 
Hi as a challenge I have got to sum a series i / (i+1). My code isn't
summing right. Any ideas why?


def main():
print("{0:15s}{1:20s}".format("i","m(i)"))
for i in range(1,20):
print("{0:<15d}{1:<20.4f}".format(i,m(i)))

def m(i):
total = 0
for i in range(1,i+1,1):
total+=(i/(i+1))
return total
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